Cinder pulverizer



Jan. 9, 1940. c. G. HAWLEY G'INDER PULVERIZER Filed Sept. .7, 1958 INVENTOR. CHARLES G. HAW LEY.

ATTORNEY S Patentedijan g g onqpna PULvE-RrzErt Charles ,oiibett'nttwlty, Cleveland, onto, assignor to Downflow Syphon Company, -0leveland, Ohio, a corporation of. Ghio. J:

Application September 7,1933, Serial No. 228,864.:

2 Claims.

..This invention relates to acinder-"pulverizer similar to that described in my'earlier applica tion, Serial No. 57,277, filed JanuaryZ, 1-936, of

which the present application is a continuation in part. Y

. The front end or smoke boxof a locomotive boiler receives the gases fromv the .fire box and likewise the burning cinders therefrom. The gases are expelled'through the stack by the energy of the steam issuing from-the exhaust nozzle and unless means operative, to intercept the cinders or to pulverize them be provided, large cinders are thrown out in flaming condition and endanger crops the right of way.

The object of this invention is toboth inter-'1 1 cept-and pulverize the cinders and toevacuate them through thestack in the form of particles so minute that they quickly lose heat when thrown into the air and. settle as inert dust.

The invention is based upon vortical and'cem trifugal action and is designed to accomplish the aforesaid object and to accomplish the de-v sired results with a minimum of resistance to the flow of the gases, so thatproper fire may be kept going in the locomotive firebox. and so that the gases may be discharged by a minimum ex- .penditure'of energy. Under the present inven-.

tion the necessary draft may be maintained while using an exhaust nozzle of greater size i than usual and hence by that much reducing the back I pressure in the engine cylinders. I

The invention will be readilyunderstood upon reference to the drawing that forms, part of this specification and inwhichz- Fig. 1'15 a vertical longitudinal section'of the front end oi" alocomotive, embodying this in-v vention. i

Fig. 2 is a fragmentary horizontal section thereof substantially upon the irregular line 2-2 of Fig. l; and v Fig. 3 is a vertical cross section substantially upon the irregular line 33 of Fig. 1. 1

Referring to the drawing, the familiar parts of the locomotive are, the smoke box shell 2, its

end 5, the front door or plate also the front fiue sheet 9, superheater li, the steam pipes i2, i2, and the smoke stack comprising the stackproper 3, and

the inside stack or petticoat pipe 4. The exhaust] nozzle whichis coaxial with the inside stack is:

marked N and the large open space within the smoke box is marked 8. 1

This invention adds few parts-to the foregoing I First tobe noted is a smoke box floor portion H,

v and buildings ta g,

the lines a, the dry pipe to, the] which is a cinder deflector, having a slanting rear end lid and which joins the shell 2. I l1ere may be corner pieces ll" to prevent lodgment of cinders in thosecorners. The floor ll is of generally segmental cross section and as here shown may be made ofcement laid in :the bottom of the smoke box. I Next to be-notedis' that the floor portion l1 contains a cavity or bowl C,which is, open at the top; the same surrounding the nozzle N and being substantially coaxial With the nozzleN and the stack 4. As shown, the cavity or bowl C may contain a metal lining' or bowl proper C, the bottomv of which is sealed by the cement in which it islembedded, The bowl C becomes a permanent partof the smoke box and a large openingC in the bottom "of the :b owl'permits the exhaust nozzle Njto'be placed in position and to be removed without disturbing either thebowlC or the bed of cement 'in'f which the bowl is laid. i 1 .The space between the floor IT and the lower end'or" the-inside stack is occupied'bya tangentially bladed whirl-promoting tuyre l5. Bolts i8 fasten the'base-of the tuyre to the top of the metal bowl C and'prevent rotation of I thetuyere l5. It is, however, readily removable, as will be pointed out. M The tuyere it forms the only passage through which ,the gases may leave, the smoke box and enter the stack 4. It is a whirl-promoting ele-' ment, comprising the many tangential blades Hid, plus a base ring 16 and plus a top ring 14, the latter containing a central opening of the psize' .of the stack 4. The union joint between the'lower end of the stack A and the top of the tangentially bladed element is desirably openable and is furnished by an interlocking ringl3 which may slip up and down on the stack portion ,4.

Clearly all of the gases emerging fromithe flues 8 and entering the smoke chamber S'must pass throughthewhirl-promoting tuyere E5 in order to reach the stack. The internal diameter of that tuyere is greater than the diameter of the central hole in the top of the tuyre; in other words, the chamber CC within the tuyre is of greater diameter and the whirling gases tending to bank therein are compelled to escapefrom the chamber CC by first moving; downward into 1 the underlying space or cavity C. From that point and leaving the cinders in violent grinding motion in the space C, the gases depart whirl: ingly upward alongwith the jet of steam emergingfrom the nozzle N. g 1 v t As stated, the tuyre is rigidlyfastened to the floor I! as by bolts i8. There are no rotating parts.

When the ring I3 is lifted to unlock the tuyere,

the latter may be slipped forward, once the bolts 18 are removed, and then may be taken bodily out through the end of the smoke box, the door 6 being open at the time.

Most of the cinders which enter the space are rotated rapidly by the force of the whirling gases and are thus ground into powder which being too light to be centrifugally retained is whirlingly evacuated with the gases.

It appears that in every case the cinder deflecting and directing floor H should always be retained and'it is to be noted that all sparks and cinders which fall on any part thereof are in: evitably swept into the centrally located whirlpromoting tuyere 55. When caught in that tuyre the cinders are certain to be whirled downward into the underlying chamber or grinding bowl.

The advantages further to be named include the capacity of the tuyere to be of any desired and large intake area, even relatively slow rotation of the gases being sufiicient to accomplish the segregation of the cinders and their ultimate pulverization and it being very desirable to perform this work with the least possible drop of pressure as measured between the flue sheet 9 and the stack proper 3. that when the front end door is open every part within the smoke box is immediately opened to view and is easy of access for inspection or repair. There are no plates, diaphragms, nettings or the like, which must first be removed.

Attention is called to the nozzle N. It does not extend above the floor H and therefore never interferes with the placement or with the removal of the whirl-promoting tuyre.

By preference the parts I4 and "5 are metal castings and the numerous tangential blades It is further to be noted which connect them have their ends embedded in said castings in the foundry process of forming them. All parts are of great durability and cost little to repair or to replace.

Attention is called to the fact that theinvention is not necessarily limited to embedding the bowl C in cement. An all metal structure may be used, omitting the cement, but it is desirable to prevent the lodgment of burning cinders in the lower part of a smoke box and the filling of cement accomplishes this purpose by occupying the spaces surrounding the metal bowl C. And as before pointed out, the floor I 1, which the cement forms, serves as a cinder deflector and a guiding part which ensures the passage of all cinders into and through the whirl-promoting element I5. I

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A locomotive front-end or smoke box, its inside stack and coaxial exhaust nozzle, the latter inside stack, said bowl portion being formed within a body of cement which is laid in the bottom of the smoke box and which presents a cinder deflecting floor surrounding the base of said tuyre.

CHARLES GILBERT HAWLEY.

positioned in the bottom of the smoke box, in 

